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<p>Hi Rob,</p>
<p>Please copy the output from your lsusb command to a reply email.
There may be a clue there.</p>
<p>Thanks.</p>
<p> Dave<br>
WA1JHK<br>
</p>
<div class="moz-cite-prefix">On 4/1/2019 2:14 PM, Rob Noll wrote:<br>
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<div dir="auto">
<div dir="auto">Hi Marshall,</div>
<div dir="auto"><br>
</div>
<div dir="auto">Thanks for the thought, but it happens with both
a transmitter and with a headset.</div>
<div dir="auto"><br>
</div>
<div dir="auto">Rob</div>
<div dir="auto"><br>
</div>
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<td valign="top"><b>From: </b></td>
<td valign="top">Marshall Oldham <a class="moz-txt-link-abbreviated" href="mailto:ke6pcv@cal-net.org">ke6pcv@cal-net.org</a></td>
</tr>
<tr>
<td valign="top"><b>Sent: </b></td>
<td valign="top">April 1, 2019 16:10:38</td>
</tr>
<tr>
<td valign="top"><b>To: </b></td>
<td valign="top">'Users of Asterisk app_rpt'
<a class="moz-txt-link-abbreviated" href="mailto:app_rpt-users@lists.allstarlink.org">app_rpt-users@lists.allstarlink.org</a></td>
</tr>
<tr>
<td valign="top"><b>Subject: </b></td>
<td valign="top">Re: [App_rpt-users] USB fob
choppy/stuttering audio</td>
</tr>
</tbody>
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<div class="WordSection1">
<p class="MsoNormal"><span style="color:#1F497D">Rob, <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Based
on your comments about the telemetry "not sounding
choppy when listening to it over the phone."<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">It
could be that RF from your transmitter is getting
into your sound fob. Do you have a transmitter
hooked up to the USB sound fob? <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">As a
test, disable your transmitter and use clip leads to
connect a PC amplified computer speaker to your TX
audio line and see if you still have choppy audio. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">If you
do NOT have choppy audio with the amplified
speaker, this surely points to some type of RF
getting into your sound fob. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Hope
this helps.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">73 <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Marshall
- ke6pcv <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
App_rpt-users
[<a class="moz-txt-link-freetext" href="mailto:app_rpt-users-bounces@lists.allstarlink.org">mailto:app_rpt-users-bounces@lists.allstarlink.org</a>]
<b>On Behalf Of </b>Rob Noll<br>
<b>Sent:</b> Sunday, March 31, 2019 7:26 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:app_rpt-users@lists.allstarlink.org">app_rpt-users@lists.allstarlink.org</a><br>
<b>Subject:</b> [App_rpt-users] USB fob
choppy/stuttering audio<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Good morning all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m trying to set up an AllStar
node using a USB fob based on the CM119 chip. I’m
having issues with choppy/stuttering audio,
particularly on telemetry. It’s bad enough that it
renders the CW ID meaningless.<o:p></o:p></p>
<p class="MsoNormal">My original thought was lack of CPU
power, but I have tried it on a Raspberry Pi 2, Pi 3,
and several virtual machines on a quad-core PC with
identical results. Also, the choppiness is NOT as bad
when using the full USB driver instead of SimpleUSB,
which I believe conclusively rules out CPU power.<o:p></o:p></p>
<p class="MsoNormal">I’ve also tried a powered USB hub,
thinking that the USB device was not receiving enough
power, with no improvement.<o:p></o:p></p>
<p class="MsoNormal">I’ve used the Android mobile app to
connect to the node, and the telemetry does not seem
to be choppy when listening to it over the app. While
I need to do some more testing to say this
conclusively, I do believe at this point that my issue
is narrowed down to the USB fob itself and/or the
specific audio stream being sent to the device.<o:p></o:p></p>
<p class="MsoNormal">I’m currently searching for a way
to alter the sample rate that ASL is sending the audio
to the device in.<o:p></o:p></p>
<p class="MsoNormal">Has anyone experienced this, and
does anyone have any suggestions?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks and 73,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Rob, WX1N<o:p></o:p></p>
</div>
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